42
Figure 44 - Premixing components
A - Burner
B - Blower
C - Fitting for blower
D -
E -
F - Gas injector
G - Gasket
H - Gas pipe
I - Inlet gas pressure probe
L - Gas valve
+ and - = burner pressure probes
3 - INSTALLATION
3.30 - Converting
the burner to use
a different type of
gas
The conversion of the burner to use a
different type of gas must be carried
out by a qualified technician.
CAUTION!!!
If the available
gas supply does not match the
type of gas with which the heater
can function, it is necessary to
convert the appliance.
To convert the heater from one gas
type to another (NAT to LP or LP to
NAT). The conversion kit is supplied
together with the water heater.
3.31 - Checking
and adjusting the
pressure of the
gas supply
The pressure of the gas supply
must match the values given in the
table in chapter 8 at the end of the
manual. To check the pressure,
proceed as follows:
close the gas cock;
remove the heater cover panels
unscrew the pressure probe “I”
(see figure 44);
connect a pressure gauge with a
resolution of at least 0.05
In.W.C. (0.1 mbar);
open the gas cock;
switch on the heater and
compare the pressure reading
with the value given in table 8.1
(Section 8- Technical Data)
close the pressure probe
perform a leakage test
If the pressure does not fall within
the maximum and minimum range
given in table 8.1, it is necessary to
operate upstream of the heater to
bring the pressure within the
prescribed range.
CAUTION!!!
Also check
the supply pressure when the
burner is off. In this condition the
pressure must not, in any
circumstances, exceed the
maximum pressure given in table
8.1.
Figure 45 - Maximum and minimum power regulators
A - Maximum power
regulator
B - Minimum power
regulator
